Create a black and white bold line illustration of a whimsical dog standing on a stool at a bathroom sink, engaging in the act of washing its paws. The dog, with a playful expression, is wearing a cozy sweater, which adds a charming touch to its playful demeanor. The bathroom has walls, sink and checkered floor. Various items are visible in the background, including a shower curtain and decorative frames on the wall, enhancing the cozy, homey ambiance. Bubbles and water are playfully splashing from the sink, emphasizing the fun nature of the scene. The outlines should be clean and clear, with no colors or shading, focusing on the shapes and contours of the elements.